15-14 Replace Chp. 1134 Historic Preservation Districts

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(4) Most properties change over time; those changes that have ac- quired historic significance in their own right shall be retained and pre- served. (5) Distinctive features, finishes, and construction techniques or ex- amples of craftsmanship that characterize an HP shall be preserved. (6) Deteriorated historic features shall be repaired rather than replaced. Where the severity of deterioration requires replacement of a distinctive feature, the new feature shall match the old in design, color, texture and other visual qualities and, where possible, materials. Replacement of missing features shall be substantiated by documentary, physical or pic- torial evidence. (7) Chemical or physical treatments, such as sandblasting, that cause damage to the historic materials and structures, if appropriate, shall be undertaken using the gentlest means possible. (8) Significant archeological resources affected by a project shall be protected and preserved. If such resources must be disturbed, mitigation measures shall be undertaken. (9) New additions, exterior alterations, or related new construction shall not destroy historic materials that characterize the property. The new work shall be differentiated from the old and shall be compatible with the massing, size, scale, and architectural features to protect the historic integrity of the property and its environment. (10)New additions and adjacent or related new construction shall be undertaken in such a manner that if removed in the future, the essential form and environment would be unimpaired. (c) hi the case of archeological properties, the Architectural Board of Review shall refer to the Advisory Council on Historic Preservation's Treatment of Archeological Properties: A Handbook or successor pub - lication(s). (d) Approval Not Self - executing Where the Commission has Issued Unique Historic Guidelines: When unique historic guidelines have been established, if the proposed construction, reconstruction, alteration or demolition is determined by the Architectural Board of Review to be appropriate, then the Architectural Board of Review shall approve the certificate of appropriateness, subject to a final additional review by the Commission. (e) Denial: If the Architectural Board of Review determines that the proposed construction, reconstruction, alteration or demolition is inap- propriate, then the Architectural Review Board shall deny the certifi- cate of appropriateness. (t) Notice of Denial to Applicant: In the event that the Architectural Board of Review denies an application for a certificate of appropriate- ness, the secretary of the Architectural Board of Review shall forthwith notify the applicant in writing and transmit to him/her a copy of the